Arro London Southall UB1 Timeline News and progress updates from Arro London new development in Southall UB1 Post a new milestone Fully reserved! All homes at Arro are now reserved. 07/07/2022 by Buildington Open Day Open Day at ARRO on Saturday 11th December 2021. Catalyst is offering a range of exclusive incentives available for this weekend only. Studios, 1 and 2-bedroom... 13/11/2021 by Buildington Virtual sales event Catalyst Homes virtual sales event on Monday 5th July 2021. 1 and 2-bedroom Shared Ownership homes from £307,500. 15/06/2021 by Buildington New on Buildington! Arro London - new Shared Ownership homes from Catalyst in the Southall Waterside development. 30/06/2019 by Buildington